BUG: unable to handle kernel NULL pointer dereference at 0000000000000106
PGD 196e21067 P4D 196e21067 PUD 196e24067 PMD 0 
Oops: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 4555 Comm: syz-executor0 Not tainted 4.17.0-rc2+ #18
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:qlist_free_all+0x37/0x160 mm/kasan/quarantine.c:163
RSP: 0018:ffff880196e2fc78 EFLAGS: 00010246
RAX: ffff880100400088 RBX: 0000000000000286 RCX: 0000000000000000
RDX: ffffea0004010000 RSI: ffffea000400001f RDI: 0000000000000286
RBP: ffff880196e2fcb0 R08: ffff880196e22cb8 R09: 0000000000000006
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 000000000000000a R14: ffff880100400088 R15: ffffffff88d18ae0
FS:  000000000223f940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000106 CR3: 0000000196e01000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 quarantine_reduce+0x141/0x170 mm/kasan/quarantine.c:259
 kasan_kmalloc+0x99/0xe0 mm/kasan/kasan.c:538
 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:490
 slab_post_alloc_hook mm/slab.h:444 [inline]
 slab_alloc mm/slab.c:3392 [inline]
 kmem_cache_alloc+0x11b/0x760 mm/slab.c:3552
 getname_flags+0xd0/0x5a0 fs/namei.c:140
 getname fs/namei.c:211 [inline]
 __do_sys_unlink fs/namei.c:4080 [inline]
 __se_sys_unlink fs/namei.c:4078 [inline]
 __x64_sys_unlink+0x35/0x50 fs/namei.c:4078
 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4550d7
RSP: 002b:00007ffc84e981a8 EFLAGS: 00000202 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004550d7
RDX: 00000000022409f3 RSI: 00007ffc84e98240 RDI: 00007ffc84e98240
RBP: 00007ffc84e99f50 R08: 0000000000000000 R09: 0000000000000010
R10: 000000000000000a R11: 0000000000000202 R12: 0000000002240940
R13: 0000000000000000 R14: 000000000000024b R15: 000000000002228e
Code: 55 48 89 e5 41 57 49 c7 c7 e0 8a d1 88 41 56 41 55 41 54 49 89 f4 53 48 83 ec 10 48 89 7d c8 4d 89 e5 4d 85 e4 0f 84 c8 00 00 00 <49> 63 95 fc 00 00 00 4c 8b 30 48 29 d0 49 83 3f 00 48 89 c6 0f 
RIP: qlist_free_all+0x37/0x160 mm/kasan/quarantine.c:163 RSP: ffff880196e2fc78
CR2: 0000000000000106
---[ end trace 644ff6d3013b3637 ]---